/* style.css - Diseño simple, grande y de alto contraste para fácil lectura en móviles */

:root {
  --primary: #0D47A1; /* Azul oscuro - alto contraste */
  --secondary: #1976D2; /* Azul medio */
  --success: #2E7D32; /* Verde oscuro para éxito */
  --error: #D32F2F; /* Rojo oscuro para errores */
  --bg: #F5F5F5; /* Gris muy claro, mejor que blanco puro */
  --text: #212121; /* Gris casi negro */
  --white: #FFFFFF;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: Arial, Helvetica, sans-serif; /* Fuentes del sistema, fáciles de leer */
}

body {
  background-color: var(--bg);
  color: var(--text);
  font-size: 20px; /* Tamaño base grande */
  line-height: 1.5;
  padding-bottom: 2rem;
}

.screen {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.hidden {
  display: none !important;
}

.active {
  display: flex;
}

header {
  background-color: var(--primary);
  color: var(--white);
  padding: 1.5rem 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

header h2 {
  font-size: 1.5rem;
  margin: 0;
}

.container {
  padding: 2rem 1.5rem;
  max-width: 600px;
  margin: 0 auto;
  width: 100%;
}

h1 {
  font-size: 2.2rem;
  margin-bottom: 0.5rem;
  color: var(--primary);
  text-align: center;
}

.subtitle {
  text-align: center;
  margin-bottom: 2rem;
  font-size: 1.2rem;
  color: #555;
}

/* Formularios */
form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

label {
  font-weight: bold;
  font-size: 1.3rem;
  color: var(--text);
}

input[type="text"],
input[type="password"],
input[type="number"] {
  width: 100%;
  padding: 1.2rem;
  font-size: 1.4rem;
  border: 2px solid #ccc;
  border-radius: 8px;
  background-color: var(--white);
}

input:focus {
  border-color: var(--primary);
  outline: none;
  box-shadow: 0 0 0 3px rgba(13, 71, 161, 0.2);
}

/* Botones Grandes */
.btn {
  width: 100%;
  padding: 1.5rem;
  font-size: 1.5rem;
  font-weight: bold;
  text-align: center;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  color: var(--white);
  text-transform: uppercase;
  transition: opacity 0.2s;
}

.btn:active {
  opacity: 0.8;
  transform: scale(0.98);
}

.btn-primary {
  background-color: var(--primary);
  margin-top: 1rem;
}

.btn-secondary {
  background-color: var(--secondary);
  display: inline-block;
  padding: 1.2rem;
}

.btn-success {
  background-color: var(--success);
  font-size: 1.6rem;
  padding: 1.8rem;
  margin-top: 1rem;
  box-shadow: 0 4px 6px rgba(0,0,0,0.3);
}

.btn-small {
  width: auto;
  padding: 0.8rem 1.2rem;
  font-size: 1.1rem;
  background-color: #555;
}

/* Input File Escondido, usando el Label como botón */
.hidden-input {
  opacity: 0;
  position: absolute;
  z-index: -1;
  width: 0.1px;
  height: 0.1px;
}

.file-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  background: #E3F2FD;
  padding: 2rem;
  border-radius: 8px;
  border: 2px dashed var(--secondary);
}

.file-count {
  font-size: 1.2rem;
  font-weight: bold;
  color: var(--primary);
}

/* Mensajes de feedback */
.message {
  margin-top: 1.5rem;
  padding: 1.2rem;
  border-radius: 8px;
  font-size: 1.2rem;
  font-weight: bold;
  text-align: center;
}

.message.error {
  background-color: #FFEBEE;
  color: var(--error);
  border: 2px solid var(--error);
}

.message.success {
  background-color: #E8F5E9;
  color: var(--success);
  border: 2px solid var(--success);
}

/* Spinner de carga */
#loading-indicator {
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

#loading-indicator p {
  font-size: 1.3rem;
  font-weight: bold;
  color: var(--primary);
  text-align: center;
}

.spinner {
  width: 60px;
  height: 60px;
  border: 8px solid #E3F2FD;
  border-top: 8px solid var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.admin-link {
  text-align: center;
  margin-top: 2rem;
  font-size: 1rem;
}

.admin-link a {
  color: var(--secondary);
}